Steering surface reconstruction of hybrid metal oxides for efficient oxygen evolution reaction in water splitting and zinc-air batteries

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外文摘要：Surface reconstruction yields real active species in electrochemical oxygen evolution reaction(OER)con-ditions;however,rationally regulating reconstruction in a targeted manner for constructing highly active OER electrocatalysts remains a formidable challenge.Here,an electrochemical activation strategy with selective etching was utilized to guide the reconstruction process of a hybrid cobalt-molybdenum oxide(CoMoO4/Co3O4@CC)in a favorable direction to improve the OER performance.Both in-situ Raman and multiple ex-situ characterization tools demonstrate that controlled surface reconstruction can be easily achieved through Mo etching,with the formation of a dynamically stable amorphous-crystalline heterostructure.Theoretical calculations together with experimental results reveal that the synergistic effects between amorphous CoOOH and crystalline Co3O4 are crucial in enhancing the catalytic perfor-mance.Consequently,the reconstructed CoMoO4/Co3O4@CC exhibits a low overpotential of 250 mV to achieve a current density of 10 mA cm-2 in 1 M KOH,and more importantly it can be practiced in elec-trolytic water splitting and rechargeable zinc-air batteries devices,achieving ultra-long stability for over 500 and 1200 h,respectively.This work provides a promising route for the construction of high-performance electrocatalysts.

外文关键词：

ElectrocatalystOxygen evolution reactionSurface reconstructionSelective etchingAmorphous-crystalline heterostructures

作者：

Jie Zhu、Junxue Chen、Xida Li、Kun Luo、Zewei Xiong、Zhiyu Zhou、Wenyun Zhu、Zhihong Luo、Jingbin Huang、Yibing Li

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作者单位：

Key Lab of New Processing Technology for Nonferrous Metals and Materials,Ministry of Education,School of Materials Science and Engineering,Guilin University of Technology,Guilin 541000,Guangxi,China

School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 100081,China

School of Materials Science and Engineering,Changzhou University,Changzhou 213164,Jiangsu,China

Wuhan Sunmoon Battery Co.,Ltd,Wuhan 430090,Hubei,China

The Key Laboratory of Rare Earth Functional Materials and Applications,Zhoukou Normal University,Zhoukou 466001,Henan,China

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基金：

Guangxi Science and Technology Major Projects

项目编号：

Guike AA23023033

出版年：

2024

DOI：

10.1016/j.jechem.2024.01.020

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.92(5)